4.7 Article

Solvothermal synthesis of LiFePO4 nanorods as high-performance cathode materials for lithium ion batteries

Journal

CERAMICS INTERNATIONAL
Volume 42, Issue 8, Pages 10297-10303

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.03.165

Keywords

Lithium ion batteries; Solvothermal method; LiFePO4; Cyclability

Funding

  1. National Natural Science Foundation of China [21401061]
  2. Provincial Natural Science Research Foundation of Anhui Universities, China [KJ2014A224, KJ2015A332]
  3. Key project of Anhui Universities support program for Outstanding Youth, China [gxyqZD2016111]

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Well-dispersed LiFePO4 nanorods in diameter of ca. 70 nm and length of 90-150 nm are prepared via a solvothermal method in the water-ethylene glycol (1:15, v/v) mixture. The microstructure and crystal orientation are characterized by high-resolution transmission electron microscopy and X-ray diffraction. The effects of carbon content on the electrochemical performances of LiFePO4 nanorods are investigated. Benefiting from the oriented nanorods and the optimized conductive carbon network, the LiFePO4/C composites exhibit remarkable cycling stability and high rate capacity. The LiFePO4/C including 9 wt% carbon delivers a large discharge capacity of 120 mAh g(-1) at 10 C rate with the capacity retention of 83% after 2000 cycles. Furthermore, the capacity retention of LiFePO4/C with 6 wt% carbon is up to 96% after 150 cycles at elevated temperature (50 degrees C) at 1 C rate. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

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